Slides
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The ProLith Project: Developing Lithium Extraction in Namibia Collaborative EU Funding Initiative for the Uis Tin Mine UIS PETALITE LOWER-INTENSITY CONVERSION PATHWAY BATTERY-GRADE LITHIUM MATERIALS Timothy Marais Head of Exploration, Andrada Mining UIS PETALITE ANDRADA MINING × GTK
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Project Overview and Strategic Partnership Three complementary partners aligning resources, research, and technology around petalite conversion. Andrada Mining Uis lithium resource, Operating Mine, and implementation platform GTK EU funding application coordination, applied mineralogy, and research integration Metso Sodium/alkaline leach expertise and industrial process technology ProLith initiative: Focused on sustainable, scalable petalite conversion from Namibia.
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Grade and Recovery Evaluation Value is optimised across the whole flowsheet - not by concentrate grade alone. Ceramic-grade target 4.2% Li₂O Higher concentrate specification Fewer contaminants Shift from grade only target to whole-system considerations value ProLith conversion target 3.5% Li₂O Optimise recovery + conversion response Less stringent concentrate specifications Reduced beneficiation intensity Increased lithium- recovery Reduced processing costs Grade Recovery
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The Traditional Metallurgical Challenge Validation focus: assessing whether Uis petalite can be processed directly without a calcination stage. Spodumene route Potential enabler Removing petalite calcination will lower process intensity and operating burden — test results to confirm. Sodium / alkaline leach targets selective lithium extraction Petalite direct processing is the Prolith hypothesis test Spodumene still requires conversion before Alkaline Leaching Recycle opportunities may support a lower- intensity flowsheet Energy- Intensive Thermal Activation
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Scope of the EU Funding Allocation Objective: To Generate Mineralogical, Metallurgical, and Processing Data EU funding application in progress Indicative programme budget: €4.5m Relates initial feed grade to recovery, conversion response, water recovery and optimisation
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Environmental and Social Governance Focus Closed-loop process-water optimisation for an arid operating environment Dense-media rinsing, recovery and recycling investigation Residue and by-products assessed for recovery, reuse or safe disposal Vocational training and skills transfer for Namibian operating teams Dense-Media Recovery Residue Assessment Skills Transfer Maximizing value while minimizing impact
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Future Vision: Phase 2 From petalite validation to circular resource management at Uis Future ambition — Eliminating Waste Phase 1: Validate Petalite recovery, conversion response, water, media optimisation and skills transfer Phase 2: Integrate Circular resource management across Uis material streams Long-Term Aspiration Recovery, reuse or responsible disposition toward a zero-waste Uis mine Phase 1 investigation: feed-grade response, recovery performance, residue behaviour and site applicability.
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Potential Impact of the ProLith Project Shared value for Namibia and the European Union Potential outcomes - subject to successful technical validation and commercial implementation NAMIBIA Battery-market access - Uis could produce petalite concentrate suitable for the battery-material value chain. Increased company revenues - a new petalite product stream could capture more value from mined material. Additional tax revenue - stronger operating revenues could increase fiscal contributions to Namibia. Additional employment - petalite production and processing will generate additional jobs. Proof of concept ➔ industrial deployment Finnish technology deployed - successful validation could lead to the deployments of Finnish processing technology and expertise. Full-scale facility opportunity - positive result would support procurement of a commercial petalite-conversion facility. EU pegmatite value unlocked - proof of concept could open a development pathway for EU pegmatite projects containing petalite. Andrada Mining × GTK
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Conclusion & Q&A Lower Process Intensity Validation focus: Utilisation of petalite for the production of lithium carbonate Higher Resource Recovery Optimize around a 3.5% Li₂O conversion feed. Namibian Value Addition Build local capability through skills transfer, site advancement, and technology integration. Can Uis set a new benchmark for sustainable petalite conversion? Questions & discussion Andrada Mining × GTK